LXR linux/drivers/serial/s3c2400.c

   1/* linux/drivers/serial/s3c240.c
   2 *
   3 * Driver for Samsung SoC onboard UARTs.
   4 *
   5 * Ben Dooks, Copyright (c) 2003-2005 Simtec Electronics
   6 *      http://armlinux.simtec.co.uk/
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11*/
  12
  13#include <linux/module.h>
  14#include <linux/ioport.h>
  15#include <linux/io.h>
  16#include <linux/platform_device.h>
  17
  18#include <asm/irq.h>
  19
  20#include <mach/hardware.h>
  21
  22#include <plat/regs-serial.h>
  23#include <mach/regs-gpio.h>
  24
  25#include "samsung.h"
  26
  27static int s3c2400_serial_getsource(struct uart_port *port,
  28                                    struct s3c24xx_uart_clksrc *clk)
  29{
  30        clk->divisor = 1;
  31        clk->name = "pclk";
  32
  33        return 0;
  34}
  35
  36static int s3c2400_serial_setsource(struct uart_port *port,
  37                                    struct s3c24xx_uart_clksrc *clk)
  38{
  39        return 0;
  40}
  41
  42static int s3c2400_serial_resetport(struct uart_port *port,
  43                                    struct s3c2410_uartcfg *cfg)
  44{
  45        dbg("s3c2400_serial_resetport: port=%p (%08lx), cfg=%p\n",
  46            port, port->mapbase, cfg);
  47
  48        wr_regl(port, S3C2410_UCON,  cfg->ucon);
  49        wr_regl(port, S3C2410_ULCON, cfg->ulcon);
  50
  51        /* reset both fifos */
  52
  53        wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
  54        wr_regl(port, S3C2410_UFCON, cfg->ufcon);
  55
  56        return 0;
  57}
  58
  59static struct s3c24xx_uart_info s3c2400_uart_inf = {
  60        .name           = "Samsung S3C2400 UART",
  61        .type           = PORT_S3C2400,
  62        .fifosize       = 16,
  63        .rx_fifomask    = S3C2410_UFSTAT_RXMASK,
  64        .rx_fifoshift   = S3C2410_UFSTAT_RXSHIFT,
  65        .rx_fifofull    = S3C2410_UFSTAT_RXFULL,
  66        .tx_fifofull    = S3C2410_UFSTAT_TXFULL,
  67        .tx_fifomask    = S3C2410_UFSTAT_TXMASK,
  68        .tx_fifoshift   = S3C2410_UFSTAT_TXSHIFT,
  69        .get_clksrc     = s3c2400_serial_getsource,
  70        .set_clksrc     = s3c2400_serial_setsource,
  71        .reset_port     = s3c2400_serial_resetport,
  72};
  73
  74static int s3c2400_serial_probe(struct platform_device *dev)
  75{
  76        return s3c24xx_serial_probe(dev, &s3c2400_uart_inf);
  77}
  78
  79static struct platform_driver s3c2400_serial_drv = {
  80        .probe          = s3c2400_serial_probe,
  81        .remove         = s3c24xx_serial_remove,
  82        .driver         = {
  83                .name   = "s3c2400-uart",
  84                .owner  = THIS_MODULE,
  85        },
  86};
  87
  88s3c24xx_console_init(&s3c2400_serial_drv, &s3c2400_uart_inf);
  89
  90static inline int s3c2400_serial_init(void)
  91{
  92        return s3c24xx_serial_init(&s3c2400_serial_drv, &s3c2400_uart_inf);
  93}
  94
  95static inline void s3c2400_serial_exit(void)
  96{
  97        platform_driver_unregister(&s3c2400_serial_drv);
  98}
  99
 100module_init(s3c2400_serial_init);
 101module_exit(s3c2400_serial_exit);
 102
 103MODULE_LICENSE("GPL v2");
 104MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
 105MODULE_DESCRIPTION("Samsung S3C2400 SoC Serial port driver");
 106MODULE_ALIAS("platform:s3c2400-uart");
 107